Thermal decomposition of ammonium paratungstate hydrate in air and inert gas atmospheres

International Journal of Refractory Metals and Hard Materials

Volumn 37, Issue , 2013, Pages 106-116

  Kalpakli, A O ^a   Arabaci, A ^a   Kahruman, C ^a   Yusufoglu, I ^a  

^a ISTANBUL UNIVERSITY   (Turkey)

Author keywords

Ammonium paratungstate hydrate; Ammonium tungsten oxide bronze; Keywords; Thermal analysis; Tungsten oxide; Tungsten suboxide

Indexed keywords

AIR ATMOSPHERE; AMMONIUM PARATUNGSTATE; END-PRODUCTS; INERT GAS ATMOSPHERE; KEYWORDS; MASS SPECTROSCOPY; THERMAL DECOMPOSITION MECHANISM; TUNGSTEN ATOMS; TUNGSTEN OXIDE; XRD;

ARGON; BRONZE; DECOMPOSITION; DEHYDRATION; DIFFERENTIAL THERMAL ANALYSIS; FOURIER TRANSFORM INFRARED SPECTROSCOPY; GAS HYDRATES; HYDRATION; HYDROGEN; MASS SPECTROMETRY; NITROGEN; OXIDES; THERMOANALYSIS; TUNGSTEN; TUNGSTEN COMPOUNDS; X RAY POWDER DIFFRACTION;

AMMONIUM COMPOUNDS;

EID: 84872153740     PISSN: 02634368     EISSN: None     Source Type: Journal    
DOI: 10.1016/j.ijrmhm.2012.11.004     Document Type: Article

References (27)

1. R.P.S. Gaur Modern hydrometallurgical production methods for tungsten J Min Met Mater Soc 58 9 2006 45 49
2. E. Lassner, and W.D. Schubert Tungsten blue oxide Int J Refract Met Hard Mater 13 1-3 1995 111 117
3. J.W. Van Put, and T.W. Zegers Hydrogen reduction of ammonium paratungstate into tungsten blue oxide-part I: literature review Int J Refract Met Hard Mater 10 3 1991 115 122
4. W.D. Schubert, B. Lux, and B. Zeiler Formation and incorporation of dopant phases during technical reduction of NS-doped tungsten blue oxide Int J Refract Met Hard Mater 13 1-3 1995 119 135
5. T. Ryu, H.Y. Sohn, K.S. Hwang, and Z.Z. Fang Chemical vapor synthesis (CVS) of tungsten nanopowder in a thermal plasma reactor Int J Refract Met Hard Mater 27 2009 149 154
6. I.M. Szilagyi, F. Hange, J. Madarasz, and G. Pokol In situ HT-XRD study on the formation of hexagonal ammonium tungsten bronze by partial reduction of ammonium paratungstate tetrahydrate Eur J Inorg Chem 2006 3413 3418
7. I.M. Szilagyi, J. Madarasz, F. Hange, and G. Pokol Partial thermal reduction of ammonium paratungstate tetrahydrate: evolved gas analysis (TG/DTA-MS) and solid state studies (XRD, FT-IR) Int J Refract Met Hard Mater 88 2007 139 144 (Pubitemid 46559706)
8. M.J.G. Fait, H.J. Lunk, M. Feist, M. Schneider, J.N. Dann, and T.A. Frisk Thermal decomposition of ammonium paratungstate tetrahydrate under non-reducing conditions, characterization by thermal analysis, X-ray diffraction and spectroscopic methods Thermochim Acta 469 2008 12 22
9. S.A.A. Mansour, and M.A. Mohamed Thermochim Acta 129 1988 187 196
10. J. Madarasz, I.M. Szilagyi, F. Hange, and G. Pokol Comparative evolved gas analyses (TG-FT-IR, TG/DTA-MS) and solid state (FT-IR, XRD) studies on thermal decomposition of ammonium paratungstate tetrahydrate (APT) in air J Anal Appl Pyrolysis 72 2004 197 201
11. O. Kirilenko, F. Giresdies, R.E. Jentoft, and T. Ressler In situ XAS and XRD studies on the structural evolution of ammonium paratungstate during thermal decomposition Eur J Inorg Chem 2005 2124 2133 (Pubitemid 40831280)
12. M.J.G. Fait, and H.-J. Lunk Thermal decomposition of ammonium paratungstate tetrahydrate traced by In situ UV/Vis diffuse reflectance spectroscopy Eur J Inorg Chem 2012 213 216
13. J.W. Van Put, T.W. Zegers, and H. Liu Hydrogen reduction of ammonium paratungstate into tungsten blue oxide - part II: experimental Int J Refract Met Hard Mater 10 1991 123 131
14. G.J. French, and F.R. Sale A reinvestigation of the thermal decomposition of ammonium paratungstate J Mater Sci 16 1981 3427 3436 (Pubitemid 12509729)
15. A.K. Basu, and F.R. Sale The thermal decomposition of ammonium paratungstate J Mater Sci 12 1977 1115 1124
16. H.-J. Lunk, B. Ziemer, M. Salmen, and D. Heidemann What is behind "tungsten blue oxides"? Int J Refract Met Hard Mater 12 1993 187 201
17. Z. Zhiqiang, W. Enxi, T. Aichun, and Q. Chungliang Formation of tungsten blue oxide and its hydrogen reduction Proc 11th Planee Seminar 1985 Vol. I RM42 Rentte Austria 1985 337 348
18. B. Ziemer, and H.-J. Lunk Quantitative X-ray powder diffraction of reduction products formed in the manufacturing process of tungsten wire Proc 12th Plansee Seminar Vol. I RM45, Rentte Austria 1989 471 481
19. H.-J. Lunk, M. Salmen, and D. Heidemann Solid State 1H-NMR studies of different tungsten blue oxides and related substances Int J Refract Met Hard Mater 16 1998 23 30
20. 3) in the thermal decomposition course of ammonium paratungstate J Anal Appl Pyrolysis 56 2000 23 31
21. I.M. Szilagyi, J. Madarasz, F. Hange, and G. Pokol Online evolved gas analyses (EGA by TG-FTIR and TG/DTA-MS) and solid state (FT-IR, XRD) studies on thermal decomposition and partial reduction of ammonium paratungstate tetrahydrate Solid State Ionics 172 2004 583 586
22. I.M. Szilagyi, J. Madarasz, F. Hange, and G. Pokol Partial reduction of ammonium paratungstate tetrahydrate. Evolved gas analysis (TG/DTA-MS) and solid state studies (XRD, FT-IR) J Therm Anal Calorim 88 2007 139 144 (Pubitemid 46559706)
23. I.M. Szilagyi, J. Pfeifer, C. Balizsi, A.L. Toth, K. Varga- Josepovits, and J. Madarasz Thermal stability of hexagonal tungsten trioxide in air J Therm Anal Calorim 94 2008 499 505
24. I.M. Szilagyi, I. Sazo, P. Kiraly, G. Tartanyi, A.L. Toth, and A. Szabo Phase transformations of ammonium tungsten bronzes J Therm Anal Calorim 98 2009 707 716
25. M.S. Marashi, J.V. Khaki, and S.M. Zebarjad Comparing thermal and mechanochemical decomposition of ammonium paratungstate (APT) Int J Refract Met Hard Mater 30 2012 177 179
26. O. Knacke, K. Kubaschewski, and K. Hesselmann Thermochemical Properties of Inorganic Substances 2nd ed. 1991 Springer-Verlag Berlin
27. R.J.D. Tilley The crystal chemistry of the higher tungsten oxides Int J Refract Met Hard Mater 13 1995 93 109